In Assam, most people still measure land using traditional units like Bigha (বিঘা), Katha (কাঠা), Lecha (লেচা), and Nal (নল). Even though units like square feet, meters, acres, and hectares are becoming more common in urban areas and government records, these local units are still widely used, especially in villages, for farming, buying or selling land, and even in legal discussions.
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Knowing how to calculate land using these units is important. It not only helps avoid confusion but also gives you clarity about the actual size of your land — something that can be helpful during land deals, dividing property, or preparing documents.
Common Land Measurement Units in Assam
Here’s a quick breakdown of the traditional units and what they mean:
- 1 Bigha (বিঘা) = 14,400 square feet
- 1 Katha (কাঠা) = 2,880 square feet (There are 5 Kathas in 1 Bigha)
- 1 Lecha (লেচা) = 144 square feet (20 Lechas = 1 Katha)
- 1 Nal (নল) = 12 feet (This is used to measure side length)
- 1 Acre = 43,560 square feet ≈ 3.025 Bighas
- 1 Hectare = 107,639 square feet ≈ 7.4 Bighas
In some areas, you might also hear about Pura (পুৰা) or slight variations in unit size depending on the district.
Simple Steps to Measure Land
If you're trying to measure your land and convert the area into Assamese units, here’s what you can do:
1. Measure the Length and Breadth
Use a measuring tape, GPS device, or any mobile measuring tool to measure the length and width of your land. You can take the measurement in feet, meters, or even in Nals (remember, 1 Nal = 12 feet).
2. Calculate Area in Square Feet
Once you have both the length and width, multiply them to get the area.
For example:
If your land is 60 ft by 48 ft,
Area = 60 × 48 = 2,880 square feet
3. Convert the Area into Traditional Units
Using the above example:
- 2,880 square feet = 1 Katha
- 14,400 square feet = 1 Bigha
- 144 square feet = 1 Lecha
So, if your area is 4,320 square feet, that would be:
1.5 Kathas or 30 Lechas
What If Your Land Isn't a Perfect Square?
Not all plots are perfect rectangles. If your land is triangular, curved, or has irregular boundaries, you can:
Split the land into smaller shapes like rectangles and triangles
Use the right formulas for each shape (e.g., ½ × base × height for triangles)
Add up the individual areas to get the total
Use Tools Like Online Land Calculators
Doing all this manually can be confusing, especially when you want results in both traditional Assamese units and modern units like square feet or hectares.
That’s where a tool like BhuMiti (ভূমিতি) Land Calculator & Converter can help.
You just need to enter the length and width (in Nals, Feet, Meter, Inch, etc.), and it will instantly show you the area in:
Bigha : Katha : Lecha
Square Feet
Hectare
It even displays decimal values if needed.
For example:
2.12 Lecha = 17.28 square feet
Bonus: Built-in Land Unit Converter
Another helpful feature of BhuMiti is its integrated powerful converter tool.
With it, you can easily convert between different units of land:
Bigha to Square Feet or Hectare, Lecha to Hectare, Square Feet, Nal to Feet, Inches and even Inch to Nal and many other units.
This saves a lot of time and effort when you're working with different measurement systems — whether for documentation, planning, or land registration.
A Few Helpful Tips
Unit sizes can vary slightly depending on the district, so always check local references.
For legal or official work, consider hiring a land surveyor to avoid disputes.
You can also use Google Earth or map-based tools for measuring large plots.
Final Thoughts
Land is one of the most valuable assets, and in Assam, where we still use our traditional units with pride, knowing how to calculate land area correctly is very important.
Whether you're a landowner, a farmer, or someone dealing with land records, tools like BhuMiti make the process faster, simpler, and more accurate, without needing to do complicated math
